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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3582 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Vulnerabilities 28 October 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Adaptive Security Appliance (ASA) Cisco Firepower Threat Defense (FTD) Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Unauthorised Access -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2021-34793 CVE-2021-34791 CVE-2021-34790 CVE-2021-34783 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M Comment: This bulletin contains three (3) Cisco Systems security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability Priority: High Advisory ID: cisco-sa-asa-ftd-dos-JxYWMJyL First Published: 2021 October 27 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvx46296 CVE Names: CVE-2021-34793 CWEs: CWE-924 Summary o A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability. This vulnerability is due to incorrect handling of certain TCP segments when the affected device is operating in transparent mode. An attacker could exploit this vulnerability by sending a crafted TCP segment through an affected device. A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL This advisory is part of the October 2021 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication . Affected Products o Vulnerable Products This vulnerability affects Cisco products if they are running a vulnerable release of Cisco ASA Software or FTD Software and have transparent firewall mode configured. For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory. Determine the Device Configuration To determine whether a device is running in transparent mode, log in to the CLI and use the show firewall command. Returned values will be either Router or Transparent . The following example shows the output for a device that is in transparent mode: > show firewall Firewall mode: Transparent > For devices running in multi-context mode, use the show firewall command in every context to determine if the device is affected by this vulnerability. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect Cisco Firepower Management Center (FMC) Software. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c /en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Fixed Releases In the following table(s), the left column lists Cisco software releases. The center column indicates whether a release is affected by the vulnerability described in this advisory and the first release that includes the fix for this vulnerability. The right column indicates whether a release is affected by any of the Critical or High SIR vulnerabilities described in this bundle and which release includes fixes for those vulnerabilities. ASA Software Cisco ASA First Fixed Release First Fixed Release for All Software for This Vulnerabilities Described in the Bundle Release Vulnerability of Advisories 9.7 and Migrate to a fixed Migrate to a fixed release. earlier ^1 release. 9.8 9.8.4.40 9.8.4.40 9.9 ^1 Migrate to a fixed Migrate to a fixed release. release. 9.10 ^1 Migrate to a fixed Migrate to a fixed release. release. 9.12 9.12.4.24 9.12.4.29 9.13 ^1 Migrate to a fixed Migrate to a fixed release. release. 9.14 9.14.2.15 9.14.3.9 9.15 9.15.1.15 9.15.1.17 9.16 Not vulnerable. 9.16.2.3 1. Cisco ASA Software releases 9.7 and earlier as well as releases 9.9, 9.10, and 9.13 have reached end of software maintenance . Customers are advised to migrate to a supported release that includes the fix for this vulnerability. FTD Software Cisco FTD First Fixed Release First Fixed Release for All Software for This Vulnerabilities Described in the Bundle Release Vulnerability of Advisories 6.2.2 and Migrate to a fixed Migrate to a fixed release. earlier ^1 release. 6.2.3 Migrate to a fixed Migrate to a fixed release. release. 6.3.0 ^1 Migrate to a fixed Migrate to a fixed release. release. 6.4.0 6.4.0.13 (Nov 2021) 6.4.0.13 (Nov 2021) 6.5.0 ^1 Migrate to a fixed Migrate to a fixed release. release. 6.6.0 6.6.5 6.6.5.1 6.7.0 6.7.0.2 6.7.0.3 (Jan 2022) 7.0.0 Not Vulnerable. 7.0.1 1. Cisco FMC and FTD Software releases 6.2.2 and earlier, as well as releases 6.3.0 and 6.5.0, have reached end of software maintenance . Customers are advised to migrate to a supported release that includes the fix for this vulnerability. For instructions on upgrading your FTD device, see Cisco Firepower Management Center Upgrade Guide . The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory. Exploitation and Public Announcements o The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source o This vulnerability was found during the resolution of a Cisco TAC support case. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. Related to This Advisory o Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2021-OCT-27 | +----------+---------------------------+----------+--------+--------------+ - ----------------------------------------------------------------------------------------------------- Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Application Level Gateway Bypass Vulnerabilities Priority: Medium Advisory ID: cisco-sa-natalg-bypass-cpKGqkng First Published: 2021 October 27 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvw35444 CSCvx50914 CVE Names: CVE-2021-34790 CVE-2021-34791 CWEs: CWE-358 Summary o Multiple vulnerabilities in the Application Level Gateway (ALG) for the Network Address Translation (NAT) feature of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the ALG and open unauthorized connections with a host located behind the ALG. For more information about these vulnerabilities, see the Details section of this advisory. Note: These vulnerabilities have been publicly discussed as NAT Slipstreaming . Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng This advisory is part of the October 2021 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication . Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco ASA Software and Cisco FTD Software. For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect Cisco Firepower Management Center (FMC) Software. Details o The vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit the other vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerability. Details about the vulnerabilities are as follows: CVE-2021-34790: Cisco ASA Software and Cisco FTD Software Session Initiation Protocol ALG Bypass Vulnerability A vulnerability in the Session Initiation Protocol (SIP) ALG for the NAT feature of Cisco ASA Software and Cisco FTD Software could allow an unauthenticated, remote attacker to bypass the ALG and open unauthorized connections with a host located behind the ALG. The SIP ALG is enabled by default. This vulnerability is due to insufficient traffic validation for the SIP ALG. An attacker could exploit this vulnerability by sending crafted SIP traffic through the ALG to a host located behind the security device. A successful exploit could allow the attacker to open unauthorized connections to the remote host and undertake actions leveraging that host. Bug ID(s): CSCvw35444 CVE ID: CVE-2021-34790 Security Impact Rating (SIR): Medium CVSS Base Score: 4.7 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N CVE-2021-34791: Cisco ASA Software and Cisco FTD Software File Transfer Protocol ALG Bypass Vulnerability A vulnerability in the File Transfer Protocol (FTP) ALG for the NAT feature of Cisco ASA Software and Cisco FTD Software could allow an unauthenticated, remote attacker to bypass the ALG and open unauthorized connections with a host located behind the ALG. The FTP ALG is enabled by default. This vulnerability is due to insufficient traffic validation for the FTP ALG. An attacker could exploit this vulnerability by sending crafted FTP traffic through the ALG to a host located behind the security device. A successful exploit could allow the attacker to open unauthorized connections to the remote host and undertake actions leveraging that host. Bug ID(s): CSCvx50914 CVE ID: CVE-2021-34791 Security Impact Rating (SIR): Medium CVSS Base Score: 4.7 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N Workarounds o There are no workarounds that address these vulnerabilities. However, there is a mitigation. Customers who do not need the SIP or FTP ALG may disable either or both ALGs to reduce the attack surface. This can be accomplished from the CLI for Cisco ASA Software or by using FlexConfig for Cisco FTD Software. While this mitigation has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment. Fixed Software o When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Fixed Releases At the time of publication, the release information in the following table (s) was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. The left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability described in this advisory and which release included the fix for this vulnerability. ASA Software Cisco ASA Software First Fixed Release for All the Vulnerabilities Release Described in this Advisory Earlier than 9.8 ^1 Migrate to a fixed release. 9.8 9.8.4.40 9.12 9.12.4.18 9.13 Migrate to a fixed release. 9.14 9.14.2.15 9.15 9.15.1.15 9.16 Not vulnerable. 1. Cisco ASA Software releases 9.7 and earlier as well as releases 9.9, 9.10, and 9.13 have reached end of software maintenance . Customers are advised to migrate to a supported release that includes the fix for these vulnerabilities. FTD Software Cisco FTD Software First Fixed Release for All the Vulnerabilities Release Described in this Advisory 6.2.2 and earlier ^ Migrate to a fixed release. 1 6.2.3 Migrate to a fixed release. 6.3.0 Migrate to a fixed release. 6.4.0 6.4.0.12 6.5.0 Migrate to a fixed release. 6.6.0 6.6.5 6.7.0 6.7.0.2 7.0.0 Not vulnerable. 1. Cisco FMC and FTD Software releases 6.2.2 and earlier, as well as releases 6.3.0 and 6.5.0, have reached end of software maintenance . Customers are advised to migrate to a supported release that includes the fix for these vulnerabilities. For instructions on upgrading your FTD device, see Cisco Firepower Management Center Upgrade Guide . The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory. Exploitation and Public Announcements o The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerabilities described in this advisory. The Cisco PSIRT is not aware of any malicious use of the vulnerabilities that are described in this advisory. Source o Cisco was made aware of these vulnerabilities through public discussion of the NAT Slipstreaming attacks. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. Related to This Advisory o Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2021-OCT-27 | +----------+---------------------------+----------+--------+--------------+ - ----------------------------------------------------------------------------------------------------------- Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-Based SSL/TLS Denial of Service Vulnerability Priority: High Advisory ID: cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M First Published: 2021 October 27 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvy55054 CVE Names: CVE-2021-34783 CWEs: CWE-119 Summary o A vulnerability in the software-based SSL/TLS message handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL/TLS decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Datagram TLS (DTLS) messages cannot be used to exploit this vulnerability. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M This advisory is part of the October 2021 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication . Affected Products o Vulnerable Products This vulnerability affects Cisco devices if they are running the following Cisco software releases under the following conditions: Cisco Affected Releases Vulnerability Details Software ASA 9.16.1 and 9.16.1.28 If affected devices are configured to process Software inbound SSL/TLS message, they are vulnerable FTD 7.0.0 and 7.0.01 to crafted SSL/TLS message that are sent to Software the device . 6.3.0 and later, but If affected devices are configured with an FTD earlier than the active SSL Decryption Policy, they are Software first fixed release vulnerable to crafted SSL/TLS message that are sent through the device . For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory. Determine Whether a Device Could Process Inbound SSL or TLS Messages To verify whether a device that is running Cisco ASA Software or Cisco FTD Software could process inbound SSL or TLS messages, use the show asp table socket | include SSL command and verify that it returns output. When this command returns any output, the device is vulnerable. When this command returns empty output, the device is not affected by the vulnerability described in this advisory. The following example shows the output of the show asp table socket | include SSL command from a device that is vulnerable: # show asp table socket | include SSL SSL 0005aa68 LISTEN 192.168.4.1:443 0.0.0.0:* SSL 0018f7a8 LISTEN 192.168.4.1:8443 0.0.0.0:* Determine Whether an SSL Decryption Policy Is Enabled There are two methods for determining whether an SSL decryption policy is enabled: Option 1: Use the CLI Use the show ssl-policy-config CLI command to verify whether an SSL decryption policy is enabled on a device. The following example shows the output of the show ssl-policy-config command on a device that does not have an SSL policy configured and is not vulnerable: > show ssl-policy-config SSL policy not yet applied. Any other output returned by the show ssl-policy-config command indicates that an SSL policy is configured and the device is affected by the vulnerability described in this advisory. For more information about the show ssl-policy-config command, see the Cisco Firepower Threat Defense Command Reference . Option 2: Use the GUI To determine whether an SSL decryption policy is enabled on a device, check the appropriate policy: For devices managed by Firepower Management Center (FMC) : Policies > Access Control > SSL For devices managed by Firepower Device Manager (FDM) : Policies > SSL Decryption Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following Cisco products when they are running Cisco FTD Software releases 6.3 through 6.7: ASA 5500-X Series Firewalls ASA 5500-X with FirePOWER Services Workarounds o There are no workarounds that address this vulnerability. Fixed Software o Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c /en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Fixed Releases In the following table(s), the left column lists Cisco software releases. The center column indicates whether a release is affected by the vulnerability described in this advisory and the first release that includes the fix for this vulnerability. The right column indicates whether a release is affected by any of the Critical or High SIR vulnerabilities described in this bundle and which release includes fixes for those vulnerabilities. ASA Software Cisco ASA First Fixed Release First Fixed Release for All Software for This Vulnerabilities Described in the Bundle Release Vulnerability of Advisories 9.7 and Not vulnerable. Migrate to a fixed release. earlier ^1 9.8 Not vulnerable. 9.8.4.40 9.9 ^1 Not vulnerable. Migrate to a fixed release. 9.10 ^1 Not vulnerable. Migrate to a fixed release. 9.12 Not vulnerable. 9.12.4.29 9.13 ^1 Not vulnerable. Migrate to a fixed release. 9.14 Not vulnerable. 9.14.3.9 9.15 Not vulnerable. 9.15.1.17 9.16 9.16.2 9.16.2.3 1. Cisco ASA Software releases 9.7 and earlier as well as releases 9.9, 9.10, and 9.13 have reached end of software maintenance . Customers are advised to migrate to a supported release that includes the fix for this vulnerability. FTD Software Cisco FTD First Fixed Release First Fixed Release for All Software for This Vulnerabilities Described in the Bundle Release Vulnerability of Advisories 6.2.2 and Not vulnerable. Migrate to a fixed release. earlier ^1 6.2.3 Not vulnerable. Migrate to a fixed release. 6.3.0 ^1 Migrate to a fixed Migrate to a fixed release. release. 6.4.0 6.4.0.13 (Nov 2021) 6.4.0.13 (Nov 2021) 6.5.0 ^1 Migrate to a fixed Migrate to a fixed release. release. 6.6.0 6.6.5 6.6.5.1 (Nov 2021) 6.7.0 6.7.0.3 (Jan 2022) 6.7.0.3 (Jan 2022) 7.0.0 7.0.1 7.0.1 1. Cisco FMC and FTD Software releases 6.2.2 and earlier, as well as releases 6.3.0 and 6.5.0, have reached end of software maintenance . Customers are advised to migrate to a supported release that includes the fix for this vulnerability. For instructions on upgrading your FTD device, see Cisco Firepower Management Center Upgrade Guide . The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory. Exploitation and Public Announcements o The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source o This vulnerability was found by Sanmith Prakash of Cisco during internal security testing. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. Related to This Advisory o Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-decrypt-dos-BMxYjm8M Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2021-OCT-27 | +----------+---------------------------+----------+--------+--------------+ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. 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If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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